Imparting stability to coal while drilling coal-bed methane

Details Imparting stability to coal while drilling coal-bed methane Imparting stability to coal while drilling coal-bed methane

E - Fixed Constructions

21

B

E21B 7/00 (2006.01) E21C 41/16 (2006.01)

Patent

CA 2451952

A method to drill a borehole is described. An aqueous based drilling fluid comprising of viscosifers, filtrate reducer and a polymer of diallyldimethyl ammonium chloride (poly-DADMAC) is used to stabilize a wellbore while drilling horizontally through coal.

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